Bassed On filed measured date and calculated result about the top beam horizontal deformation of the anchor piles retaining structure in Handan．systematical analyses of their effective aspects of the defor· mation of top beam，the deformation and the level deformation distribution of top beam alonng with the excavation of the deep pit are studied in this paper．The deformation of the top beam will be increscent alonging with the excavation of the deep．However，the deformation of the top beam is differ on the diffirent test point．It is concluded that in design the time—space effect should be considered．